I disagree with your beat down of Pandora. I find one of the most frustrating things about turntable.fm to be the lack of appropriateness of songs to their rooms genre (if we're going to compare it to Pandora). I can listen to a personalized Pandora channel for hours at a time while down voting a few songs. I find myself hitting the lame button in a DJ room as often as awesome because you're at the mercy of the DJ's taste.

I think the idea is great for what it is right now: a way for a group of people to get together and share some music with each other. I just don't see being comparable to Pandora.